Wacken Open Air (W:O:A) is one of the leading summer open air heavy metal music festivals. It takes place annually in the small town of Wacken in Schleswig-Holstein, northern Germany. With 80,000 festival visitors, and including personnel a total of roughly 82,500 attendees in 2010, it attracts all kinds of metal music fans, such as fans of black metal, death metal, power metal, thrash metal, gothic metal, folk metal, and even metalcore and hard rock from around the world.

The festival was first held in 1990 as a small event for local German bands. By 1998 the event had become t...